<?php	
//写入多条数据
insert into student set sname='admin999';
insert into student (sname,age,sex) values ("admin",12,"男"),("admin888",13,"女");
//default
insert into student (sname,age,sex) values ("后盾",default,default);

//replace（如果数据库有该数据，则会执行修改；反之会写入）
//执行修改
replace into student (sid,sname) values (15,"后盾网人人做后盾");
//执行写入
replace into student (sid,sname) values (16,"后盾网人人做后盾");


//update 修改
update student set sname='后盾网人人做后盾' where sid=16;

//删除 delete
delete from student where sid=16;










